* {
	/* 页面初始化 清除元素的内外边距 */
	padding: 0;
	margin: 0;
}
body {
	/* 宽度占浏览器可视区域的高度 */
	width: 100vm;
	background-color: #f2f2f2;
}
li {
	/* 清除li元素前面的项目符号 */
	list-style: none;
}
a {
	/* 清除a元素的下划线 */
	text-decoration: none;
	color: #000;
}
.navbar {
	width: 100%;
	height: 70px;
	background-color: #fff;
	/* 盒子阴影 */
	box-shadow: 0 0 5px rgba(0, 0, 0, 0.3);
}
.navbar .nav {
	width: 300px;
	height: 100%;
	float: right;
}
.navbar .nav ul {
	/* 相对定位 */
	position: relative;
	/* 弹性布局 */

	/* 让子元素平均分配宽度 */
	justify-content: space-around;
	width: 100%;
	height: 100%;
}
.navbar ul li:first-child img {
	height: 100%;
	width: 70px;
	border-radius: 50%;
}
.navbar .nav ul > li {
	width: 100%;
	height: 100%;
}
.navbar .nav ul > li > a {
	/* 因为a元素是行内元素 必须将其转为行内块或者块级才能设置宽度和高度 */
	display: block;
	width: 100%;
	height: 100%;
	line-height: 70px;
	text-align: center;
}
.navbar .nav ul > li ol {
	width: 100%;
	background-color: #fff;
	box-shadow: 1px 1px 3px rgba(0, 0, 0, 0.2);
	/* 让盒子先沿着y轴缩放到0 也就是隐藏了 */
	transform: scaleY(0);
	/* 我们需要将盒子从上面滑动下来 设置一下缩放的中心点即可 设置到最上面的中间位置 */
	transform-origin: 50% 0;
	/* 设置过渡 */
	transition: all 0.6s;
}
.navbar .nav ul > li ol li {
	height: 70px;
	border-bottom: 1px solid rgb(245, 245, 245);
}
.navbar .nav ul > li ol li a {
	display: block;
	width: 100%;
	height: 100%;
	line-height: 70px;
	text-align: center;
}
.navbar .nav ul > li ol li:hover {
	background-color: rgba(0, 0, 0, 0.03);
}
.navbar .nav ul > li:hover ol {
	transform: scaleY(1);
}
/*左右盒子*/

a.box {
  color: #4caf50;
  text-decoration: none;
}

a.box:hover {
  text-decoration: underline;
}

/* ==== 核心布局 ==== */

.wrapper {
  display: flex;
  justify-content: space-between;
  margin: 0 auto;
  max-width: 90%;
}

.left-box {

  width: 48%;
  padding: 30px;
  box-sizing: border-box;
  background-color: #fff;
  box-shadow: 0px 10px 20px rgba(0, 0, 0, 0.1);
  border-radius: 5px;
}

.right-box {
    width: 48%;
  padding: 30px;
  box-sizing: border-box;
  background-color: #fff;
  box-shadow: 0px 10px 20px rgba(0, 0, 0, 0.1);
  border-radius: 5px;
  }

.left-box img {
  width: 100%;
  border-radius: 5px;
}
.right-box img {
  width: 100%;
  border-radius: 5px;
}

.left-box img {
  width: 100%;
  border-radius: 5px;
}

h1.box {
  font-size: 24px;
  margin-top: 0;
  margin-bottom: 20px;
  text-align: center;
}

h2.box {
  font-size: 20px;
  margin-top: 20px;
  margin-bottom: 10px;
  color: #000000;
  border-bottom: 1px solid #ddd;
  padding-bottom: 10px;
}

p.box {
  font-size:16px;
  line-height:1.6em;
  margin-top: 10px;
  margin-bottom: 20px;
  text-align: center;
}

ul.box {
  list-style-type: none;
  margin: 0;
  padding: 0;
}

li.box {
  font-size:16px;
  line-height:1.6em;
  margin-bottom: 5px;
  text-align: center;
}

table.box {
    margin: auto;
    margin-top: 20px;
    border-collapse: collapse;
    width: 100%;
}

th.box, td.box {
  border: 1px solid #ddd;
  padding: 8px;
  text-align: center;
}

th.box {
  background-color: #f5f5f5;
}

tr.box:nth-child(even) {
  background-color: #f2f2f2;
}


form {
      width: 93%;
      padding: 20px;
    }

form label {
      font-weight: bold;
      font-size: 18px;
      display: block;
      margin-bottom: 8px;
      color: #666;
    }

form input[type=text],
form input[type=password] {
      border: none;
      border-radius: 5px;
      font-size: 16px;
      padding: 15px;
      width: 93%;
      margin-bottom: 10px;
      box-shadow: 0 0 5px rgba(0, 0, 0, 0.2);
    }

form input[type="submit"] {
      background: #0099ff;
      color: #fff;
      border: none;
      border-radius: 5px;
      font-size: 18px;
      padding: 15px 30px;
      cursor: pointer;
      transition: background 0.3s ease-in-out;
      margin-top: 20px;
      width: 100%;
      display: block;
    }

form input[type="submit"]:hover {
      background: #0077cc;
    }



form select {
  font-family: 'Open Sans', sans-serif;
  font-size: 16px;
  font-weight: 400;
  color: #333;
  line-height: 1.3;
  width: 93%;
  height: 50px;
  margin: 20px 0;
  padding: 10px 35px 10px 20px;
  background-color: #fff;
  background-image: url(https://img.icons8.com/ios-filled/10/000000/chevron-down.png);
  background-repeat: no-repeat;
  background-position: right 10px center;
  background-size: 10px 10px;
  border: 2px solid #c2c2c2;
  border-radius: 5px;
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  cursor: pointer;
}

form select:focus {
  outline: none;
  background-color: #fff;
  box-shadow: 0 0 4px 0 rgba(0, 0, 0, 0.1);
}

form select option {
  font-family: 'Open Sans', sans-serif;
  font-size: 16px;
  font-weight: 400;
  color: #333;
  line-height: 1.3;
  background-color: #fff;
  cursor: pointer;
  transition: all 0.3s ease;
}

form select option:hover {
  color: #fff;
  background-color: #2a9fd6;
}

.HZ {
  display: inline-block;
  padding: 10px 20px;
  font-size: 16px;
  font-weight: bold;
  text-align: center;
  text-decoration: none;
  border-radius: 5px;
}

.blue {
  color: #fff;
  background-color: #1e90ff;
  box-shadow: 0 3px 0 #0c5da5;
}

.blue:hover {
  background-color: #0077b3;
}
.B {
      margin: auto;
      background: #0099ff;
      color: #fff;
      border: none;
      border-radius: 5px;
      font-size: 18px;
      padding: 15px 30px;
      cursor: pointer;
      transition: background 0.3s ease-in-out;
      margin-top: 20px;
      width: 83%;
      display: block;
    }

.B:hover {
      background: #0077cc;
    }